Coherent’s geophysical fibers feature superior thermal chemical and hydrogen resistance for distributed temperature, pressure, flow, acoustic and strain sensing in harsh environments. Our pure silica core SM and graded index MM fibers provide the highest immunity to hydrogen induced losses. Coherent’s carbon coating provides high levels of hermeticity to germanium doped fibers for temperatures up to 200°C and superior mechanical reliability. Fibers are also available with mid-temperature acrylate (150°C), silicone (200°C) and polyimide (300°C) coating for industry leading temperature and chemical resistance.
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